diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/decode_indices.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/decode_indices.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/decode_indices.c b/lib/rbcodec/codecs/libopus/silk/decode_indices.c new file mode 100644 index 0000000000..00eef1de52 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/decode_indices.c | |||
@@ -0,0 +1,151 @@ | |||
1 | /*********************************************************************** | ||
2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. | ||
3 | Redistribution and use in source and binary forms, with or without | ||
4 | modification, are permitted provided that the following conditions | ||
5 | are met: | ||
6 | - Redistributions of source code must retain the above copyright notice, | ||
7 | this list of conditions and the following disclaimer. | ||
8 | - Redistributions in binary form must reproduce the above copyright | ||
9 | notice, this list of conditions and the following disclaimer in the | ||
10 | documentation and/or other materials provided with the distribution. | ||
11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the | ||
12 | names of specific contributors, may be used to endorse or promote | ||
13 | products derived from this software without specific prior written | ||
14 | permission. | ||
15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” | ||
16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
25 | POSSIBILITY OF SUCH DAMAGE. | ||
26 | ***********************************************************************/ | ||
27 | |||
28 | #ifdef HAVE_CONFIG_H | ||
29 | #include "opus_config.h" | ||
30 | #endif | ||
31 | |||
32 | #include "main.h" | ||
33 | |||
34 | /* Decode side-information parameters from payload */ | ||
35 | void silk_decode_indices( | ||
36 | silk_decoder_state *psDec, /* I/O State */ | ||
37 | ec_dec *psRangeDec, /* I/O Compressor data structure */ | ||
38 | opus_int FrameIndex, /* I Frame number */ | ||
39 | opus_int decode_LBRR, /* I Flag indicating LBRR data is being decoded */ | ||
40 | opus_int condCoding /* I The type of conditional coding to use */ | ||
41 | ) | ||
42 | { | ||
43 | opus_int i, k, Ix; | ||
44 | opus_int decode_absolute_lagIndex, delta_lagIndex; | ||
45 | opus_int16 ec_ix[ MAX_LPC_ORDER ]; | ||
46 | opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; | ||
47 | |||
48 | /*******************************************/ | ||
49 | /* Decode signal type and quantizer offset */ | ||
50 | /*******************************************/ | ||
51 | if( decode_LBRR || psDec->VAD_flags[ FrameIndex ] ) { | ||
52 | Ix = ec_dec_icdf( psRangeDec, silk_type_offset_VAD_iCDF, 8 ) + 2; | ||
53 | } else { | ||
54 | Ix = ec_dec_icdf( psRangeDec, silk_type_offset_no_VAD_iCDF, 8 ); | ||
55 | } | ||
56 | psDec->indices.signalType = (opus_int8)silk_RSHIFT( Ix, 1 ); | ||
57 | psDec->indices.quantOffsetType = (opus_int8)( Ix & 1 ); | ||
58 | |||
59 | /****************/ | ||
60 | /* Decode gains */ | ||
61 | /****************/ | ||
62 | /* First subframe */ | ||
63 | if( condCoding == CODE_CONDITIONALLY ) { | ||
64 | /* Conditional coding */ | ||
65 | psDec->indices.GainsIndices[ 0 ] = (opus_int8)ec_dec_icdf( psRangeDec, silk_delta_gain_iCDF, 8 ); | ||
66 | } else { | ||
67 | /* Independent coding, in two stages: MSB bits followed by 3 LSBs */ | ||
68 | psDec->indices.GainsIndices[ 0 ] = (opus_int8)silk_LSHIFT( ec_dec_icdf( psRangeDec, silk_gain_iCDF[ psDec->indices.signalType ], 8 ), 3 ); | ||
69 | psDec->indices.GainsIndices[ 0 ] += (opus_int8)ec_dec_icdf( psRangeDec, silk_uniform8_iCDF, 8 ); | ||
70 | } | ||
71 | |||
72 | /* Remaining subframes */ | ||
73 | for( i = 1; i < psDec->nb_subfr; i++ ) { | ||
74 | psDec->indices.GainsIndices[ i ] = (opus_int8)ec_dec_icdf( psRangeDec, silk_delta_gain_iCDF, 8 ); | ||
75 | } | ||
76 | |||
77 | /**********************/ | ||
78 | /* Decode LSF Indices */ | ||
79 | /**********************/ | ||
80 | psDec->indices.NLSFIndices[ 0 ] = (opus_int8)ec_dec_icdf( psRangeDec, &psDec->psNLSF_CB->CB1_iCDF[ ( psDec->indices.signalType >> 1 ) * psDec->psNLSF_CB->nVectors ], 8 ); | ||
81 | silk_NLSF_unpack( ec_ix, pred_Q8, psDec->psNLSF_CB, psDec->indices.NLSFIndices[ 0 ] ); | ||
82 | silk_assert( psDec->psNLSF_CB->order == psDec->LPC_order ); | ||
83 | for( i = 0; i < psDec->psNLSF_CB->order; i++ ) { | ||
84 | Ix = ec_dec_icdf( psRangeDec, &psDec->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); | ||
85 | if( Ix == 0 ) { | ||
86 | Ix -= ec_dec_icdf( psRangeDec, silk_NLSF_EXT_iCDF, 8 ); | ||
87 | } else if( Ix == 2 * NLSF_QUANT_MAX_AMPLITUDE ) { | ||
88 | Ix += ec_dec_icdf( psRangeDec, silk_NLSF_EXT_iCDF, 8 ); | ||
89 | } | ||
90 | psDec->indices.NLSFIndices[ i+1 ] = (opus_int8)( Ix - NLSF_QUANT_MAX_AMPLITUDE ); | ||
91 | } | ||
92 | |||
93 | /* Decode LSF interpolation factor */ | ||
94 | if( psDec->nb_subfr == MAX_NB_SUBFR ) { | ||
95 | psDec->indices.NLSFInterpCoef_Q2 = (opus_int8)ec_dec_icdf( psRangeDec, silk_NLSF_interpolation_factor_iCDF, 8 ); | ||
96 | } else { | ||
97 | psDec->indices.NLSFInterpCoef_Q2 = 4; | ||
98 | } | ||
99 | |||
100 | if( psDec->indices.signalType == TYPE_VOICED ) | ||
101 | { | ||
102 | /*********************/ | ||
103 | /* Decode pitch lags */ | ||
104 | /*********************/ | ||
105 | /* Get lag index */ | ||
106 | decode_absolute_lagIndex = 1; | ||
107 | if( condCoding == CODE_CONDITIONALLY && psDec->ec_prevSignalType == TYPE_VOICED ) { | ||
108 | /* Decode Delta index */ | ||
109 | delta_lagIndex = (opus_int16)ec_dec_icdf( psRangeDec, silk_pitch_delta_iCDF, 8 ); | ||
110 | if( delta_lagIndex > 0 ) { | ||
111 | delta_lagIndex = delta_lagIndex - 9; | ||
112 | psDec->indices.lagIndex = (opus_int16)( psDec->ec_prevLagIndex + delta_lagIndex ); | ||
113 | decode_absolute_lagIndex = 0; | ||
114 | } | ||
115 | } | ||
116 | if( decode_absolute_lagIndex ) { | ||
117 | /* Absolute decoding */ | ||
118 | psDec->indices.lagIndex = (opus_int16)ec_dec_icdf( psRangeDec, silk_pitch_lag_iCDF, 8 ) * silk_RSHIFT( psDec->fs_kHz, 1 ); | ||
119 | psDec->indices.lagIndex += (opus_int16)ec_dec_icdf( psRangeDec, psDec->pitch_lag_low_bits_iCDF, 8 ); | ||
120 | } | ||
121 | psDec->ec_prevLagIndex = psDec->indices.lagIndex; | ||
122 | |||
123 | /* Get countour index */ | ||
124 | psDec->indices.contourIndex = (opus_int8)ec_dec_icdf( psRangeDec, psDec->pitch_contour_iCDF, 8 ); | ||
125 | |||
126 | /********************/ | ||
127 | /* Decode LTP gains */ | ||
128 | /********************/ | ||
129 | /* Decode PERIndex value */ | ||
130 | psDec->indices.PERIndex = (opus_int8)ec_dec_icdf( psRangeDec, silk_LTP_per_index_iCDF, 8 ); | ||
131 | |||
132 | for( k = 0; k < psDec->nb_subfr; k++ ) { | ||
133 | psDec->indices.LTPIndex[ k ] = (opus_int8)ec_dec_icdf( psRangeDec, silk_LTP_gain_iCDF_ptrs[ psDec->indices.PERIndex ], 8 ); | ||
134 | } | ||
135 | |||
136 | /**********************/ | ||
137 | /* Decode LTP scaling */ | ||
138 | /**********************/ | ||
139 | if( condCoding == CODE_INDEPENDENTLY ) { | ||
140 | psDec->indices.LTP_scaleIndex = (opus_int8)ec_dec_icdf( psRangeDec, silk_LTPscale_iCDF, 8 ); | ||
141 | } else { | ||
142 | psDec->indices.LTP_scaleIndex = 0; | ||
143 | } | ||
144 | } | ||
145 | psDec->ec_prevSignalType = psDec->indices.signalType; | ||
146 | |||
147 | /***************/ | ||
148 | /* Decode seed */ | ||
149 | /***************/ | ||
150 | psDec->indices.Seed = (opus_int8)ec_dec_icdf( psRangeDec, silk_uniform4_iCDF, 8 ); | ||
151 | } | ||